07/05/2026
I recently saw an exchange between people with different opinions, and one side kept declaring...
"I only trust peer-reviewed research."
Sounds like a reasonable position. The problem is most people who say it don't know what peer review actually is... or what it isn't.
Here's what the insiders say.
Peter Gøtzsche co-founded the Cochrane Collaboration (the gold standard of evidence-based medicine). An independent network of researchers whose entire purpose was to synthesise clinical evidence without interference from the companies that funded it. If you've ever been told "the Cochrane review confirms it's safe," this is the organisation they're talking about.
Gøtzsche spent three decades studying the pharmaceutical industry... not as an opponent of medicine, but as someone who believed medicine's credibility depended on its willingness to scrutinise itself. He published hundreds of peer-reviewed papers. He wrote a book documenting industry fraud not as an occasional aberration but as a structural feature of how drugs are approved and marketed.
In 2018, he published a critique of a Cochrane review of the HPV vaccine, arguing it had minimised evidence of potential harms and failed to apply the rigorous standards Cochrane existed to uphold.
The Cochrane governing board voted to expel him. Four other board members resigned in protest.
The review he questioned continues to be cited as definitive evidence of safety!
He isn't alone.
Richard Horton (editor-in-chief of The Lancet, one of the world's oldest medical journals) wrote in 2015:
"Much of the scientific literature, perhaps half, may simply be untrue. Afflicted by studies with small sample sizes, tiny effects, invalid exploratory analyses, and flagrant conflicts of interest… science has taken a turn towards darkness."
He wasn't writing from the fringe. He was writing from the top of the institution.
Marcia Angell (former editor-in-chief of the New England Journal of Medicine) put it even more plainly:
"It is simply no longer possible to believe much of the clinical research that is published."
Twenty years as a medical journal editor. That was her conclusion.
John Ioannidis, a Stanford professor and one of the most cited scientists in the world, published a now-famous paper titled "Why Most Published Research Findings Are False." His argument wasn't that scientists are liars. It's that the system has a structural bias: positive results get published. Negative results don't. Journals want results. Careers require results. Funders want results. So the literature we read is not a representative sample of the studies that were done.... it's the ones that found what someone hoped they would find.
Irving Kirsch at Harvard used freedom-of-information laws to obtain the complete clinical trial data for antidepressants... including the trials that were run but never published. When he pooled everything together, the difference between SSRIs and placebo shrank below the FDA's own threshold for clinical significance.
The drugs are still prescribed 40 million times a year in the United States.
Ben Goldacre at Oxford found that roughly half of all clinical trials are never published, and that positive results are three times more likely to see the light of day than negative ones.
In 2015, an independent consortium of 270 researchers tried to replicate 100 published psychology studies. Fewer than 40% held up. A similar project in cancer biology found fewer than half the landmark findings could be reproduced.
These weren't obscure papers. Many were widely cited studies used to justify drugs worth billions of dollars.
None of this means science doesn't work.
It means the machinery through which science gets produced, published, and translated into the prescriptions you receive has been captured by interests that are not, at their core, interested in the truth.
And when researchers try to say so, from inside the institutions, the response isn't to investigate the problem. It's to make the cost of speaking high enough that most people choose not to.
Gøtzsche was expelled from the organisation he helped build. He then faced a formal investigation under Danish health law at his own institution. Two years later, he was cleared. The finding he questioned was never proven wrong. The process was the punishment.
Peer review is a quality check... not a guarantee. And when the people doing the reviewing are financially connected to the companies whose products they're evaluating, "peer reviewed" starts to mean something very different to what most people assume.
The sources above aren't anti-medicine. They're the editor of The Lancet, the former editor of the New England Journal of Medicine, the co-founder of the Cochrane Collaboration, and a Stanford epidemiologist whose work on research methodology is among the most cited in his field.
They looked more carefully than they were supposed to. And they told us what they found.
"I only trust peer-reviewed research" = "I don't know the landscape, I don't know how the machine works, I'd rather not do the work... and hope the vocal majority are right"
Dr Dan (DC)
